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首页> 外文期刊>NDT & E international >Remote inspection of surface cracks in metallic structures with fiber-guided laser array spots thermography
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Remote inspection of surface cracks in metallic structures with fiber-guided laser array spots thermography

机译：光纤引导激光阵列点热成像技术远程检查金属结构中的表面裂纹

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摘要

In this work, a fiber-guided laser array spots thermography (LAST) system with good flexibility is proposed for the inspection of surface cracks in metallic structural objects with difficult access. To generate an array of laser spots on the target surface, an optical head with fiber delivery is designed and fabricated at first, which has good adaptability and robustness. Second, a numerical simulation model is developed to optimize the spatial distribution of the laser spots. In addition, an improved image processing method with use of multiple background free images is developed to enhance the crack detectability from the LAST images. Finally, cracks of different types in stainless steel specimens are successfully detected from the thermal images obtained using the fiber-guided LAST system.
机译：在这项工作中，提出了一种具有良好灵活性的光纤引导激光阵列点热成像（LAST）系统，用于检查难以接近的金属结构物体的表面裂纹。为了在目标表面上生成激光点阵列，首先设计并制造了具有光纤传输功能的光头，该头具有良好的适应性和鲁棒性。其次，建立了数值模拟模型以优化激光点的空间分布。另外，开发了一种使用多个无背景图像的改进的图像处理方法，以增强来自LAST图像的裂纹检测能力。最后，从纤维引导的LAST系统获得的热图像成功检测出不锈钢样品中不同类型的裂纹。

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  • 来源
    《NDT & E international》 |2017年第12期|213-220|共8页
  • 作者

    Qiu Jinxing; Pei Cuixiang; Liu Haochen; Chen Zhenmao; Demachi Kazuyuki;

  • 作者单位

    Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, China;

    Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, China;

    Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, China;

    Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, China;

    School of Engineering, The University of Tokyo, Tokyo, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fiber coupling; Laser array spots thermography; Lock-in thermography; Non-destructive test; Surface crack;

    机译：光纤耦合;激光阵列点热成像;锁定热成像;无损检测;表面裂纹;

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